.bg1{
    background-image: url("./img/qc.jpg");
    background-size: cover;
    width: 100%;
    height: 49%;
    text-align: center;
}
.h{
    padding-top: 10%;
    color: #fbfbff;
    font-size: 700%;
    text-shadow: #ff2320 0px 1px 2px;
}
.bg2{
    width: 100%;
    height: 48%;
    margin-top: 1%;
}
.a{
    width: 24%;
    height: 100%;
    background-image: url("./img/3.jpg");
    background-size: cover;
    float: left;
}
.b{
    margin-left: 1%;
    width: 24%;
    height: 100%;
    background-image: url("./img/2.jpg");
    background-size: cover;
    float: left;
}
.c{
    margin-left: 1%;
    width: 24%;
    height: 100%;
    background-image: url("./img/1.jpg");
    background-size: cover;
    float: left;
}
.d{
    margin-left: 1%;
    width: 25%;
    height: 100%;
    background-image: url("./img/4.jpg");
    background-size: cover;
    float: left;
}